Woburn is a city in Middlesex County, Massachusetts, United States. The population was 40,876 at the 2020 census. Woburn is located 9 miles (14 km) north of Boston. Woburn uses Massachusetts' mayor-council form of government, in which an elected mayor is the executive and a partly district-based, partly at-large city council is the legislature. It was the last of Massachusetts' 351 municipalities to refer to members of its city council as "aldermen".